作者:Sha Huang、Amanda K. Miller、Weiming Wu
DOI:10.1016/j.tetlet.2009.09.054
日期:2009.11
Pyridinium ketones have been found to exist as hydrates and hemiacetals in considerable amount in aqueous and alcoholic solutions, respectively. The relative position of the pyridinium positive charge has a large effect on the equilibrium constants. The polar substituent constants, σ∗, of the pyridinium group substituted at different positions can be estimated from the hydration constants.
已发现吡啶酮酮分别以相当数量的水合物和半缩醛形式存在于水溶液和醇溶液中。吡啶正电荷的相对位置对平衡常数有很大影响。在不同位置取代的吡啶鎓基团的极性取代基常数σ * 可以从水合常数估计。